After using the recorder and the Walkman for a long time, dull sound, unclear sound quality and large background noise often occur. At this time, the head may be severely magnetized, and a special degausser should be used for degaussing. A simple method to judge the magnetization of the magnetic head is as follows.
Turn on the power of the recorder, open the cassette door, place the recorder on the worktable, find a long section of fine cotton yarn, tie a pin on one end, then pick up the cotton yarn and hang the pin on the other end Then slowly move the pin closer to the working surface of the magnetic head in the warehouse door. When the pin is close to the magnetic head, if the magnetic head suddenly attracts the pin, it indicates that the magnetic head has been severely magnetized and should be demagnetized completely.
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